Well-screen



M. E. LAYNE.

WELL SCREEN. APPLICATION FILED APR. s, IsIr.

PimentedI Jam. 20, 1920.

MAHLON E. LAYNE, O MEMPHS, TENNESSEE.

WELL-SCREEN.

Speeication of Letters Iatent.

Patented Jan. 20, 1920.

Application filed April 9, 1917. Serial No. 160,588.

To all whom t may concern.'

Lie it known that Marlins E. LAYNE,

itizen of the United States, residing at iemphis, in the county of Shelby and State Tennessee, have invented certain new and us ful improvements in Well-Screens, of which the following; is a specification.

This invention relates to well screens for straining the water or oil at the bottom of we ls `before it is pumped to the surface, and has to do, in general, with that class of screen known in the art as wire woundv or wrapped screen, wherein a perforated casing or tubing has spirally wrapped thereon a helix of screening` wire. It has for its ohjects the provision of a. screen of the character described. wherein the strands of the helix will be evenly and regularly spaced and firmly held in position and wherein the space between wires will be absolutely free of any impediment to the inflow and circulation of the liquid. thereby securing a maximum of efficiency. More particularly, it has for its object the provision of a screen,

tho wire of which presents in cross-section the, shape of a section of a truncatedcone and` which l have termed a keystone wire in previous patents issued to me, and which has a depending portion or lug on the side coming next to the casing adapted to project into a groove or thread thereon. The invention contemplates the provision of a wire-wrapped screen which combines the advantages of a keystoneshaped wire and of a spiral groove or thread on the casing, all of which appearing more. full)Y hereinafter.

The foregoing. together with such other objects as may hereinafter appear. or are incident to my invention. I attain by means of a construction. the preferred embodiment of which l have shown in the accompanying drawings. wherein- Figure l is a longitudinal section of a screen illustrating my improvement applied thereto: and Fig. 2 is a side elevation showing the general arrangement of the wire on the screen. .The perforated casing or tube is designated by the numeral 7, the perl forations by the numeral 8, and the wire by 9. The wire, it will be seen7 is of the keystone shape above referred to, and is wound with the narrower face seated against the casing and with the wider face on the outside. The inner face 10 of the wireis made broad enough toprevent tipping to oneside or the other when wrapping the Wire or when inserting the screen into the Well, especially where the formations are very rough and hard, asI` for instance, rock formations. The wire is preferably disposed on the screen with its longer axis vertical to the surface of the screen. At the base of the wire. is formed preferably at one side though not necessarily the projecting strip or continuous lug il adapted to lit into the groove 12. While. wrapping the wire this projectingl strip which tits into the groove 12 spaces the strands of the helix evenly and regularly and holds them firmly in place against movement longitudinally of the casing after having been wound thereon.

l claim 1. In a well screen, the combination of a supporting frame, a helical groove formed thereon and a helix of screening wire wound thereon. said wire having a flat base contactingr with the surface of the supporting frame and having a projection extending into the groove.

2. In a well screen, the combination/of a supporting frame. a helical groove formed thereon and a helix of screening wire wound thereon, said wire having` a. fiat base contacting with the, surface of the supporting frame and having a projection at one side thereof extending into the groove.

In testimony whereof, I have hereunto signed my name.

MAHLGN E. LAYNE. 

